Get Head Set from Java TreeSet example
- /*
- Get Head Set from Java TreeSet example
- This Java Example shows how to get the portion of TreeSet containing the values
- less than the specified value using headSet method of Java TreeSet class.
- */
- import java.util.SortedSet;
- import java.util.TreeSet;
- public class GetHeadSetFromTreeSetExample {
- public static void main(String[] args) {
- //create TreeSet object
- TreeSet tSet = new TreeSet();
- //add elements to TreeSet
- tSet.add("1");
- tSet.add("3");
- tSet.add("2");
- tSet.add("5");
- tSet.add("4");
- /*
- To get a Head Set from Java TreeSet use,
- SortedSet headSet(Object fromElement) method of Java TreeSet class.
- This method returns the portion of TreeSet containing elements less than
- fromElement.
- Please note that, the SortedSet returned by this method is backed by
- the original TreeSet. So any changes made to SortedSet will be
- reflected back to original TreeSet.
- */
- SortedSet sortedSet = tSet.headSet("3");
- System.out.println("Head Set Contains : " + sortedSet);
- }
- }
- /*
- Output would be
- Head Set Contains : [1, 2]
- */
